Zobrazeno 1 - 10
of 279
pro vyhledávání: '"Gintaras Valušis"'
Autor:
Rusnė Ivaškevičiūtė-Povilauskienė, Paulius Kizevičius, Ernestas Nacius, Domas Jokubauskis, Kęstutis Ikamas, Alvydas Lisauskas, Natalia Alexeeva, Ieva Matulaitienė, Vytautas Jukna, Sergej Orlov, Linas Minkevičius, Gintaras Valušis
Publikováno v:
Light: Science & Applications, Vol 11, Iss 1, Pp 1-13 (2022)
Demonstration of generation of terahertz structured light in a form of configurable Airy beam for imaging aims and 2D materials inspection using exclusively flat silicon diffractive optics.
Externí odkaz:
https://doaj.org/article/65da491e72b5433c933b25038066be55
Autor:
Rusnė Ivaškevičiūtė-Povilauskienė, Vladislovas Čižas, Ernestas Nacius, Ignas Grigelionis, Karolis Redeckas, Matas Bernatonis, Sergej Orlov, Gintaras Valušis, Linas Minkevičius
Publikováno v:
Frontiers in Physics, Vol 11 (2023)
The potential of terahertz (THz) imaging implementation in a large variety of applications requires compact, reliable, and relatively low-cost solutions in systems constituents. Here we focus on the development of passive optical elements and demonst
Externí odkaz:
https://doaj.org/article/20079d48d3e2449a8941dcc5e4812a7f
Publikováno v:
Nanomaterials, Vol 13, Iss 13, p 1993 (2023)
The detailed theoretical study of high-frequency signal gain, when a probe microwave signal is comparable to the AC pump electric field in a semiconductor superlattice, is presented. We identified conditions under which a doped superlattice biased by
Externí odkaz:
https://doaj.org/article/7592517e1f4b451fa78aacf0d5f25da6
Autor:
Agnieszka Siemion, Linas Minkevičius, Domas Jokubauskis, Rusnė Ivaškevičiūtė-Povilauskienė, Gintaras Valušis
Publikováno v:
AIP Advances, Vol 11, Iss 10, Pp 105212-105212-11 (2021)
A two- and four-step phase shifting (PS) technique in terahertz (THz) digital holography is proposed. Relying on the Mach–Zehnder interferometer-based setup, it was demonstrated that the two-step and four-step PS in Fresnel holograms can assist in
Externí odkaz:
https://doaj.org/article/f6f9ecf997a1409d939bf849a0aea754
Autor:
Vincas Tamošiūnas, Linas Minkevičius, Ignotas Bučius, Domas Jokubauskis, Karolis Redeckas, Gintaras Valušis
Publikováno v:
Sensors, Vol 22, Iss 21, p 8485 (2022)
Terahertz (THz) imaging is a powerful technique allowing us to explore non-conducting materials or their arrangements such as envelopes, packaging substances, and clothing materials in a nondestructive way. The direct implementation of THz imaging sy
Externí odkaz:
https://doaj.org/article/915c573230e044f391ce45fc6db61b28
Autor:
Faustino Wahaia, Irmantas Kašalynas, Linas Minkevičius, Catia D. Carvalho Silva, Andrzej Urbanowicz, Gintaras Valušis
Publikováno v:
Journal of Spectral Imaging, Vol 9, p a2 (2020)
Terahertz waves are sensitive to differences in biological tissue hydration, we present promising results regarding the feasibility of applying this with terahertz time-domain spectroscopy and imaging for early detection of cancer through the charact
Externí odkaz:
https://doaj.org/article/12f13cf9e4b94b528e248606225f28c4
Autor:
Alesia Paddubskaya, Nadzeya Valynets, Sergey Maksimenko, Mukesh Kumar, Marian Baah, Markku Pekkarinen, Yuri Svirko, Gintaras Valušis, Polina Kuzhir
Publikováno v:
Nanomaterials, Vol 11, Iss 10, p 2494 (2021)
We propose an original technique for the fabrication of terahertz (THz) metasurfaces comprising a 3D printed regular array of polymer hemispheres covered with a thin conductive layer. We demonstrate that the deposition of a thin metal layer onto poly
Externí odkaz:
https://doaj.org/article/09c4af714afa4d9e91a880d4cce79994
Publikováno v:
Sensors, Vol 21, Iss 12, p 4092 (2021)
In this roadmap article, we have focused on the most recent advances in terahertz (THz) imaging with particular attention paid to the optimization and miniaturization of the THz imaging systems. Such systems entail enhanced functionality, reduced pow
Externí odkaz:
https://doaj.org/article/f93729f22fc24350af815135e15f27c5
Autor:
Liang Qi, Linas Minkevičius, Andrzej Urbanowicz, Andrej Švigelj, Ignas Grigelionis, Irmantas Kašalynas, Janez Trontelj, Gintaras Valušis
Publikováno v:
Sensors, Vol 21, Iss 10, p 3510 (2021)
An ability of lensless titanium-based antenna coupled microbolometers (Ti-μbolometers) operating at room temperature to monitor precisely radiation patterns in terahertz time-domain spectroscopy (THz-TDS) systems are demonstrated. To provide compreh
Externí odkaz:
https://doaj.org/article/ae4c33c7264546e08f2ac0f31eb4911b
Autor:
Linas Minkevičius, Liang Qi, Agnieszka Siemion, Domas Jokubauskis, Aleksander Sešek, Andrej Švigelj, Janez Trontelj, Dalius Seliuta, Irmantas Kašalynas, Gintaras Valušis
Publikováno v:
Applied Sciences, Vol 10, Iss 10, p 3400 (2020)
Terahertz (THz) imaging and spectroscopy set-ups require fine optical alignment or precise control of spatial mode profile. We demonstrate universal, convenient and easy-to-use imaging—resonant and broadband antenna coupled ultrasensitive titanium-
Externí odkaz:
https://doaj.org/article/43e887d685f74c8f82d5498378f088a3